People suspected of belonging to terrorist organizations could lose their Dutch citizenship under new legislation passed by the country's parliament on Tuesday.
The measure does not require definitive proof that an individual has joined a terrorist organization, only evidence that the person has made plans to become a member.
Under the law, such individuals could be declared undesirable foreigners. If abroad, it would prevent them from returning to Dutch territory. Because it is illegal to leave a person stateless, it can only be used on people who have dual citizenship in the Netherlands and another country.
The measure was pushed through by right-wing and centre-right parties, despite opposition by centre-left and left-wing parties, who said the law violates legal principles. That ensured it narrow passage in the Senate on Tuesday. It had previously been approved by the lower house of parliament.
The measure also makes it easier to ban entry to the Netherlands and to require terrorism suspects to register with authorities.